fix(runtime-core): avoid object prototype keys in property access cache (#2416)

LongTengDao · web-flow · commit ba881f919051 · 2020-10-19T17:11:28.000-04:00
diff --git a/packages/runtime-core/src/component.ts b/packages/runtime-core/src/component.ts
@@ -549,7 +549,7 @@ function setupStatefulComponent(
     }
   }
   // 0. create render proxy property access cache
-  instance.accessCache = {}
+  instance.accessCache = Object.create(null)
   // 1. create public instance / render proxy
   // also mark it raw so it's never observed
   instance.proxy = new Proxy(instance.ctx, PublicInstanceProxyHandlers)

Original file line number	Diff line number	Diff line change
`@@ -549,7 +549,7 @@ function setupStatefulComponent(`
`549`	`549`	`}`
`550`	`550`	`}`
`551`	`551`	`// 0. create render proxy property access cache`
`552`		`- instance.accessCache = {}`
	`552`	`+ instance.accessCache = Object.create(null)`
`553`	`553`	`// 1. create public instance / render proxy`
`554`	`554`	`// also mark it raw so it's never observed`
`555`	`555`	`instance.proxy = new Proxy(instance.ctx, PublicInstanceProxyHandlers)`